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Stereochemical studies 98. Saturated heterocycles 100. Synthesis of stereoisomeric 2-ethylimino-3,1-perhydrobenzoxazines and benzothiazines

✍ Scribed by Gábor Bernáth; Ferenc Fülöp; György Csirinyi; Sándor Szalma

Publisher: Springer Vienna
Year: 1987
Tongue: English
Weight: 313 KB
Volume: 118
Category: Article
ISSN: 0026-9247
DOI: 10.1007/bf00809932

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## Abstract The configuration and conformation of __Z__‐ and __E__‐__N__‐methyl‐ and ‐__N__‐benzyl‐2‐__p__‐nitrophenyl‐4,5‐, and ‐5,6‐tetramethylenetetrahydro‐1,3‐oxazines were determined by ^1^H and ^13^C NMR spectroscopy. The __Z__ isomers were proved to be conformationally homogeneous, having th